/Engine/Plugins/Importers/USDImporter/Source/USDStageEditor/Public/USDStageEditorBlueprintLibrary.h
Saves the currently opened USD Stage back to disk, or to a new file in case it hasn't been saved yet. Corresponds to the "File -> Save" action on the USD Stage Editor menu bar.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="USD|Menu Actions") static void FileSave ( const [FString](API\Runtime\Core\Containers\FString) & OutputFilePathIfUnsaved )